// Copyright 2013 Petar Maymounkov
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package ns

import (
	"circuit/kit/rh"
	"fmt"
	"unsafe"
)

// Server
type Server struct {
	slash rh.FID
}

func New(slash Dir) *Server {
	return &Server{slash: NewFID("/", slash)}
}

func (srv *Server) SignIn(user, _ string) (rh.Session, error) {
	return &Session{
		srv:   srv,
		user:  user,
		slash: srv.slash,
	}, nil
}

func (srv *Server) String() string {
	return fmt.Sprintf("ns_%02x", uint64(uintptr(unsafe.Pointer(srv))))
}

// Session
type Session struct {
	srv   *Server
	user  string
	slash rh.FID
}

func (ssn *Session) String() string {
	return fmt.Sprintf("%s_%02x", ssn.srv.String(), uint64(uintptr(unsafe.Pointer(ssn))))
}

func (ssn *Session) Walk(wname []string) (rh.FID, error) {
	return ssn.slash.Walk(wname)
}

func (ssn *Session) SignOut() {}
